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repeated bout effect

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https://www.readbyqxmd.com/read/28338369/dha-rich-fish-oil-increases-the-omega-3-index-and-lowers-the-oxygen-cost-of-physiologically-stressful-cycling-in-trained-individuals
#1
Lachlan Hingley, Michael J Macartney, Marc A Brown, Peter L McLennan, Gregory E Peoples
Dietary fish oil, providing docosahexaenoic acid (DHA) modulates oxygen consumption and fatigue in animal models. However, in humans predominately supplemented with high eicosapentaenoic acid (EPA), there is no evidence of endurance performance enhancement. Therefore, this study examined if DHA-rich fish oil could improve repeated bouts of physiologically stressful cycling and a subsequent time trial in a state of fatigue. Twenty-six trained males took part in a double-blind study and were supplemented with either 2x1g/day soy oil (Control) or DHA-rich tuna fish oil (Nu-Mega) (FO) (560mg DHA / 140mg eicosapentaenoic acid (EPA)) for eight weeks...
March 24, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28326310/cardiopulmonary-response-during-whole-body-vibration-training-in-patients-with-severe-copd
#2
Rainer Gloeckl, Petra Richter, Sandra Winterkamp, Michael Pfeifer, Christoph Nell, Jeffrey W Christle, Klaus Kenn
Several studies in patients with chronic obstructive pulmonary disease (COPD) have shown that whole-body vibration training (WBVT) has beneficial effects on exercise capacity. However, the acute cardiopulmonary demand during WBVT remains unknown and was therefore investigated in this study. Ten patients with severe COPD (forced expiratory volume in 1 s: 38±8% predicted) were examined on two consecutive days. On day one, symptom-limited cardiopulmonary exercise testing was performed on a cycle ergometer. The next day, six bouts of repeated squat exercises were performed in random order for one, two or three minutes either with or without WBVT while metabolic demands were simultaneously measured...
January 2017: ERJ Open Research
https://www.readbyqxmd.com/read/28324755/sedentary-behavior-different-types-of-operationalization-influence-outcome-measures
#3
Malou H J Fanchamps, Hendrika J G van den Berg-Emons, Henk J Stam, Johannes B J Bussmann
INTRODUCTION: Sedentary behavior (SB) influences health status independently of physical activity. The formal definition of SB is: "any waking behavior characterized by an energy expenditure ≤1.5 METs while in a sitting or reclining posture". However, measuring SB mostly does not include both the intensity and postural component. The aim of this study was to quantify the effect of type of operationalization of SB on total sedentary time and the pattern of SB. METHODS: 53 healthy subjects were measured 24h with a multi-sensor activity monitor that provides a valid one-second detection of body postures and movements and a calculated intensity measure...
March 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28324168/the-effect-of-eccentric-exercise-with-blood-flow-restriction-on-neuromuscular-activation-microvascular-oxygenation-and-the-repeated-bout-effect
#4
Jakob D Lauver, Trent E Cayot, Timothy Rotarius, Barry W Scheuermann
PURPOSE: To examine the effect of low-intensity eccentric contractions with and without blood flow restriction (BFR) on microvascular oxygenation, neuromuscular activation, and the repeated bout effect (RBE). METHODS: Participants were randomly assigned to either low-intensity (LI), low-intensity with BFR (LI-BFR), or a control (CON) group. Participants in LI and LI-BFR performed a preconditioning bout of low-intensity eccentric exercise prior to about of maximal eccentric exercise...
March 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28318450/repeated-sprints-in-fasted-state-impair-reaction-time-performance
#5
Anissa Cherif, Romain Meeusen, Abdulaziz Farooq, Walid Briki, Mohamed Amine Fenneni, Karim Chamari, Bart Roelands
OBJECTIVE: The aim of this study was to assess the effects of 3-day Islamic intermittent fasting (3d-IF) on cognitive performance and serum levels of neurotrophic factors (brain-derived neurotrophic factor [BDNF] and vascular endothelial growth factor [VEGF]) before and after repeated sprints. METHODS: Twenty-one physically active male Muslims (29.8 ± 5.9 years, exercising 4 ± 1.5 times/week) were randomly assigned to one of 2 experimental sessions: the control or nonfasting session (CS) or the fasting session (FS)...
March 20, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28302573/stair-walking-is-more-energizing-than-low-dose-caffeine-in-sleep-deprived-young-women
#6
Derek D Randolph, Patrick J O'Connor
INTRODUCTION: The acute energizing effect of exercise and caffeine has never been examined in a single study of adults with chronic sleep deprivation but evidence from a study of this type could help individuals choose between these two common alertness-enhancing options. AIM: The apriori primary aim of this experiment was to compare the influence of 10-min of low-to-moderate intensity stair walking to the consumption of capsules containing 50mg caffeine or flour (placebo) on feelings of energy in physically active, college female caffeine users with chronic insufficient sleep...
March 14, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28291744/consequences-of-short-interruptions-of-bouts-of-walking-on-estimates-of-compliance-to-physical-activity-guidelines
#7
Juliet Ann Harvey, Danny Rafferty, Sebastien Chastin
INTRODUCTION: Current guidelines on physical activity suggest that 30 mins of moderate intensity physical activity can be accumulated in continuous bouts of at least 10 mins. It has been shown by use of activity monitoring that it is difficult to achieve 10 mins of completely uninterrupted walking in the free-living urban environment where we have obstacles such as roads to cross. The aim of this study was to examine the effect of short interruptions in walking on the rate of oxygen uptake (ml·kg·min-1) to determine if walking with short interruptions can still be considered continuous...
March 14, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28247026/one-night-of-partial-sleep-deprivation-impairs-recovery-from-a-single-exercise-training-session
#8
Dale E Rae, Tayla Chin, Kagiso Dikgomo, Lee Hill, Andrew J McKune, Tertius A Kohn, Laura C Roden
PURPOSE: The effects of sleep deprivation on physical performance are well documented, but data on the consequence of sleep deprivation on recovery from exercise are limited. The aim was to compare cyclists' recovery from a single bout of high-intensity interval training (HIIT) after which they were given either a normal night of sleep (CON, 7.56 ± 0.63 h) or half of their usual time in bed (DEP, 3.83 ± 0.33 h). METHODS: In this randomized cross-over intervention study, 16 trained male cyclists (age 32 ± 7 years), relative peak power output (PPO 4...
February 28, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28228584/high-cardiorespiratory-fitness-in-early-to-late-middle-age-preserves-the-cortical-circuitry-associated-with-brain-heart-integration-during-volitional-exercise
#9
Katelyn N Wood, Torri A Luchyshyn, J Kevin Shoemaker
This study tested the hypothesis that high cardiorespiratory fitness (VO2max) preserves the cortical circuitry associated with cardiac arousal during exercise in middle to older-aged individuals. Observations of changes in heart rate (HR) and in cortical blood oxygenation level dependent (BOLD) images were made in 52 healthy, active individuals (45-73 years; 16 female) across a range of fitness (26-66mL/kg/min). Seven repeated bouts of isometric handgrip (IHG) at 40% MVC force were performed using functional magnetic resonance imaging at 3-Tesla, with each contraction lasting 20 sec and separated by 40 sec of rest...
February 22, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28224232/effects-of-traumeel-tr14-on-recovery-and-inflammatory-immune-response-after-repeated-bouts-of-exercise-a-double-blind-rct
#10
RANDOMIZED CONTROLLED TRIAL
Kerstin Muders, Christian Pilat, Vanessa Deuster, Torsten Frech, Karsten Krüger, Jörn Pons-Kühnemann, Frank-Christoph Mooren
PURPOSE: The purpose of this double-blind, randomized, placebo-controlled clinical trial was to investigate the effects of the natural combination medicine Traumeel (Tr14) consisting of 14 diluted biological and mineral components on the inflammatory immune response and recovery up to 72 h after repetitive bouts of bicycle tests. METHODS: Antigen-stimulated IL-1ra and IL-6 were defined as primary outcome measures. Moreover, various immunological and serum muscle damage markers were investigated...
March 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28210043/repeated-3-minute-stair-climbing-descending-exercise-after-a-meal-over-2-weeks-increases-serum-1-5-anhydroglucitol-levels-in-people-with-type-2-diabetes
#11
Hiroto Honda, Makoto Igaki, Yuki Hatanaka, Motoaki Komatsu, Shin-Ichiro Tanaka, Tetsuo Miki, Yumika Matsuki, Tetsuo Takaishi, Tatsuya Hayashi
[Purpose] The purpose of this study was to examine the hypoglycemic effect of a postprandial exercise program using brief stair climbing-descending exercise in people with type 2 diabetes. [Subjects and Methods] Seven males with uncomplicated type 2 diabetes (age 68.0 ± 3.7 years) performed two sets of stair climbing-descending exercise 60 and 120 min after each meal for the first 2 weeks but not for the following 2 weeks. Each set of exercise comprised 3-min of continuous repetition of climbing briskly to the second floor followed by slow waking down to the first floor in their home...
January 2017: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28182508/effects-of-carbohydrate-ingestion-and-carbohydrate-mouth-rinse-on-repeat-sprint-performance
#12
Ben M Krings, Timothy J Peterson, Brandon D Shepherd, Matthew J McAllister, JohnEric W Smith
The purpose of this investigation was to examine to the influence of carbohydrate ingestion (CHOI) and carbohydrate mouth rinse (CHOR) on acute repeat maximal sprint performance. Fourteen healthy males (age: 21.7 ± 1.8 years, mass: 82.3 ± 12.3 kg) completed a total of five 15-second maximal repeat sprints on a cycle ergometer against 0.075 kg . kg(-1) body mass each separated by four minutes of active recovery. Subjects completed four experimental trials and were randomly assigned one of four treatments: (1) CHOI, (2) CHOR, (3) placebo mouth rinse (PLAR), (4) placebo ingestion (PLAI)...
February 9, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/28177386/defining-risk-for-low-reticuloruminal-ph-during-the-diet-transition-period-in-a-commercial-feedlot-in-western-canada
#13
B I Wiese, S Hendrick, J G Campbell, J J McKinnon, K A Beauchemin, T A McAllister, G B Penner
The objective of the current study was to measure reticuloruminal pH in cattle in a commercial feedlot setting to determine the incidence and extent of low reticuloruminal pH for steers and heifers as they transition to a high-concentrate finishing diet. Reticuloruminal pH was measured in 16 "mixed breed" steers (4 steers/pen with 4 pens) and 16 "mixed breed" heifers (4 heifers/pen with 4 pens) housed in commercial feedlot pens, with 227 ± 13 and 249 ± 6 cattle/pen cohort steers and heifers, respectively, for the diet transition period...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28174436/cardiovascular-response-to-bouts-of-exercise-with-blood-flow-restriction
#14
Kestutis Bunevicius, Arturas Sujeta, Kristina Poderiene, Birute Zachariene, Viktoras Silinskas, Rimantas Minkevicius, Jonas Poderys
[Purpose] Occlusion training with low-intensity resistance exercises and blood flow restriction increases muscle cross-sectional area and strength. This form of training is used in rehabilitation; therefore, the aim of this study was to examine the effect of one occlusion training session on the cardiovascular response to bouts of exercise. [Subjects and Methods] Two groups took part: a control group without blood flow restriction and an experimental group with blood flow restriction. A single training session was used with the exercise intensity set at 40% of the one repetition maximum...
December 2016: Journal of Physical Therapy Science
https://www.readbyqxmd.com/read/28154976/the-effect-of-temperature-gradient-and-load-carriage-on-oxygen-consumption-posture-and-gait-characteristics
#15
Katrina Hinde, Ray Lloyd, Chris Low, Carlton Cooke
PURPOSE: The purpose of this experiment was to evaluate the effect of load carriage in a range of temperatures to establish the interaction between cold exposure, the magnitude of change from unloaded to loaded walking and gradient. METHODS: Eleven participants (19-27 years) provided written informed consent before performing six randomly ordered walking trials in six temperatures (20, 10, 5, 0, -5, and -10 °C). Trials involved two unloaded walking bouts before and after loaded walking (18...
March 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28119486/repeated-treatments-with-chitosan-in-combination-with-antibiotics-completely-eradicate-uropathogenic-escherichia-coli-from-infected-mouse-urinary-bladders
#16
Andreja Erman, Veronika Križan Hergouth, Matthew G Blango, Mojca Kerec Kos, Matthew A Mulvey, Peter Veranič
Uropathogenic Escherichia coli (UPEC), the primary causative agent of urinary tract infections, colonize and invade the epithelial cells of the bladder urothelium. Infection of immature urothelial cells can result in the formation of persistent intracellular reservoirs that are refractory to antibiotic treatments. Previously, we defined a novel therapeutic strategy utilizing the bladder cell exfoliant chitosan to deplete UPEC reservoirs. However, though a single treatment of chitosan followed by ciprofloxacin administration had a marked effect on reducing UPEC titers within the bladder, this treatment failed to prevent relapsing bacteriuria...
January 24, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28080323/oral-adenosine-5-triphosphate-atp-administration-increases-postexercise-atp-levels-muscle-excitability-and-athletic-performance-following-a-repeated-sprint-bout
#17
Martin Purpura, John A Rathmacher, Matthew H Sharp, Ryan P Lowery, Kevin A Shields, Jeremy M Partl, Jacob M Wilson, Ralf Jäger
OBJECTIVE: Oral adenosine-5'-triphosphate (ATP) administration has failed to increase plasma ATP levels; however, chronic supplementation with ATP has shown to increase power, strength, lean body mass, and blood flow in trained athletes. The purpose of this study was to investigate the effects of ATP supplementation on postexercise ATP levels and on muscle activation and excitability and power following a repeated sprint bout. METHODS: In a double-blind, placebo-controlled, randomized design, 42 healthy male individuals were given either 400 mg of ATP as disodium salt or placebo for 2 weeks prior to an exercise bout...
January 12, 2017: Journal of the American College of Nutrition
https://www.readbyqxmd.com/read/28069324/differences-in-therapeutic-effects-of-topically-applied-corticosteroid-and-tacrolimus-on-atopic-dermatitis-like-symptoms-in-nc-nga-mice
#18
Atsushi Noguchi, Mitsutoshi Tominaga, Nobuaki Takahashi, Hironori Matsuda, Yayoi Kamata, Yoshie Umehara, Kyi Chan Ko, Yasushi Suga, Hideoki Ogawa, Kenji Takamori
BACKGROUND: Topical corticosteroid and calcineurin inhibitor have similar therapeutic benefits in atopic dermatitis (AD), but the differences in therapeutic mechanisms of action of these agents against AD symptoms are not fully understood. OBJECTIVE: This study was performed to examine the different effects of topical betamethasone valerate (BMV), clobetasol propionate (CBP), and tacrolimus (TAC) on itch-related behavior and dermatitis in NC/Nga mice with AD-like symptoms...
April 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28028601/voluntary-inhalation-of-methamphetamine-a-novel-strategy-for-studying-intake-non-invasively
#19
C Juarez-Portilla, R D Kim, M Robotham, M Tariq, M Pitter, J LeSauter, R Silver
RATIONALE: The abuse of the psychostimulant methamphetamine (MA) is associated with substantial costs and limited treatment options. To understand the mechanisms that lead to abuse, animal models of voluntary drug intake are crucial. OBJECTIVES: We aimed to develop a protocol to study long-term non-invasive voluntary intake of MA in mice. METHODS: Mice were maintained in their home cages and allowed daily 1 h access to an attached tunnel leading to a test chamber in which nebulized MA was available...
December 27, 2016: Psychopharmacology
https://www.readbyqxmd.com/read/28012910/a-single-bout-of-arm-crank-exercise-promotes-positive-emotions-and-post-exercise-hypotension-in-patients-with-symptomatic-peripheral-artery%C3%A2-disease
#20
B R Cavalcante, R M Ritti-Dias, A H G Soares, A H Lima, M A Correia, L D De Matos, F Gobbi, A S Leicht, N Wolosker, G G Cucato
OBJECTIVE/BACKGROUND: The objective was to analyze the acute effects of a single bout of arm cranking exercise on affective and cardiovascular parameters in patients with symptomatic peripheral artery disease (PAD). METHODS: This was a prospective, controlled, crossover study. Eleven men with symptomatic PAD underwent two experimental sessions in a random order: control or arm crank exercise (15 × 2 minutes bouts of arm crank exercise interrupted by 2 minutes rest intervals)...
December 21, 2016: European Journal of Vascular and Endovascular Surgery
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